Parus (russian: Парус meaning ''Sail''), also Tsyklon-B or Tsiklon-B (russian: Циклон-Б meaning ''Cyclone-B'') and Tsikada-M (russian: Цикада-М meaning ''Cicada-M''),

GRAU index The Main Missile and Artillery Directorate of the Ministry of Defense of the Russian Federation (), commonly referred to by its transliterated Russian acronym GRAU (), is a department of the Russian Ministry of Defense. It is subordinate to the ...

11F627, is a Russian, previously

Soviet The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...

satellite constellation used for

communication Communication (from la, communicare, meaning "to share" or "to be in relation with") is usually defined as the transmission of information. The term may also refer to the message communicated through such transmissions or the field of inquir ...

and

navigation Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.Bowditch, 2003:799. The field of navigation includes four general categories: land navigation, ...

. As of 2010, 99 Parus satellites have been launched, starting with

Kosmos 700 The cosmos (, ) is another name for the Universe. Using the word ''cosmos'' implies viewing the universe as a complex and orderly system or entity. The cosmos, and understandings of the reasons for its existence and significance, are studied in ...

in 1974. All launches have been conducted using

Kosmos-3M The Kosmos-3M (russian: Космос-3М meaning "''Cosmos''", GRAU index 11K65M) was a Russian space launch vehicle, member of the Kosmos rocket family. It was a liquid-fueled two-stage launch vehicle, first launched in 1967 and with over 42 ...

carrier rockets, flying from sites 132 and

133 133 may refer to: *133 (number) * AD 133 *133 BC *133 (song) *133 (New Jersey bus) 133 may refer to: *133 (number) * AD 133 *133 BC *133 (song) 133 may refer to: *133 (number) *AD 133 *133 BC *133 (song) *133 (New Jersey bus) 133 may refer to: * ...

at the

Plesetsk Cosmodrome Plesetsk Cosmodrome ( rus, Космодром «Плесецк», r=Kosmodrom "Plesetsk", p=kəsmɐˈdrom plʲɪˈsʲet͡sk) is a Russian spaceport located in Mirny, Arkhangelsk Oblast, about 800 km north of Moscow and approximately 200&n ...

. The prime function of Parus satellites is to provide location information for Tsiklon-B navigation system. Parus satellites are produced by

JSC Information Satellite Systems JSC Information Satellite Systems Reshetnev (russian: Информационные спутниковые системы имени академика М. Ф. Решетнёва, Informatsionnye sputnikovye systemy imeny akademika M. F. Reshetnyov ...

(formerly NPO PM), based on the KAUR-1

satellite bus A satellite bus (or spacecraft bus) is the main body and structural component of a satellite or spacecraft, in which the payload and all scientific instruments are held. Bus-derived satellites are opposed to specially produced satellites. Bus-d ...

. They have a mass of around , and a design life of 18–24 months. The satellites operate in

low Earth orbit A low Earth orbit (LEO) is an orbit around Earth with a period of 128 minutes or less (making at least 11.25 orbits per day) and an eccentricity less than 0.25. Most of the artificial objects in outer space are in LEO, with an altitude never mor ...

s, typically with a

perigee An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. For example, the apsides of the Earth are called the aphelion and perihelion. General description There are two apsides in any ellip ...

of about , an

apogee An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. For example, the apsides of the Earth are called the aphelion and perihelion. General description There are two apsides in any ellip ...

of and 82.9°

inclination Orbital inclination measures the tilt of an object's orbit around a celestial body. It is expressed as the angle between a Plane of reference, reference plane and the orbital plane or Axis of rotation, axis of direction of the orbiting object ...

. They are operated by the

Russian Aerospace Defence Forces The Russian Aerospace Defence Forces (VVKO) ( rus, Войска воздушно-космической обороны (ВВКО), Voyska vozdushno-kosmicheskoy oborony (VVKO)) was a branch of the Armed Forces of the Russian Federation responsi ...

, and are used primarily for navigation,

Store and forward Store and forward is a telecommunications technique in which information is sent to an intermediate station where it is kept and sent at a later time to the final destination or to another intermediate station. The intermediate station, or node in ...

communication, and to relay data from US-P satellites. Some of the navigation functions are believed to have been superseded by the

GLONASS GLONASS (russian: ГЛОНАСС, label=none, ; rus, links=no, Глобальная навигационная спутниковая система, r=Global'naya Navigatsionnaya Sputnikovaya Sistema, t=Global Navigation Satellite System) is ...

system.

References

Communications satellites of the Soviet Union Navigation satellite constellations Navigation satellites of the Soviet Union Satellites using the KAUR bus {{USSR-spacecraft-stub

See also

References